With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccmeEphoneLoginStatus
Cisco Call Manager Express Ephone Login Status
1.3.6.1.4.1.9.9.439.1.2.6.1.12
True indicates that a phone user is currently logged in on this phone. False indicates no phone user currently logged in on this phone.
Back to CISCO-CCME-MIB MIB page.
IPHost Network monitor allows you to monitor ccmeEphoneLoginStatus on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.